- After admission an envelope will be openend by the study coordinator in the hospital in which a code is for treatment or no treatment with fibrin sealant. The study coordinator will tell the outcome only to the personel of the OR who need to know it for preparation and usage of the fibrin sealant. People from the operation room do not communicate this outcome to the nursery. Except for treatment with fibrin sealant there will be no difference in treatment of the patients.